Electric security device.



C. STILLE.

ELECTRIC SECURITY DEVICE.

APPLICATION FILED IULY18. 1911.

1 1 59,1 28. Patented Nov. 2, 1915.

CLOCK WORK Wiinesses muenior cum? s'rInLn, or rmnnnmw, NEAR BERLIN,GERMANY.

ELECTRIC SECURITY DEVICE.

Application filed July 18, 1911,

To all whom it may concern.

Be it known that I, CURT STILLE, of Friedenau, a subject of the King ofPrussla, and whose ost-o'flice address is 29 Siidwest Corso, Frie enau,near Berlin, Kingdom of by impulses from a distance in order to close acircuit for firing the mine. It is particularly advantageous that onlyauthorized persons familiar with the apparatus should be able to operatethe device. This requirement is fulfilled by the present invention. Therelease takes place only when a given number of Wave impulses (acoustic,optical or electric) are given, and only when the impulses are givenwithin a time interval. For generating the wave impulses acoustlc,optical, or electric devices can be used, as for instance a diaphragm,which responds either to a sound or to a tuned note by resonance. Lightwaves or impulses can act on selenium cells, while electrical action canbe obtained by the use of Hertzian waves, etc. D

A device according to this invent1on 1s illustrated'in the accompanyingdrawing,

wherein the single electromagnets and switches which are united in theapparatus are shown diagrammatically with the electric connections; theswitch belonging to the time switch being shown in development.

The switch A is an adjustable timeswitch of the usual kind, that is tosay, on switching it in, a small clockwork is wound up which. runs downin a given time interval,

- which can be, however, adjusted as desired.

The winding device of the clock work (not shown in'the drawing) ismarked by the letter a. The time switch is provided with a reversingdevice on the rotating spindle of the clockwork, which is shown indevelopment. This switching device can be made 1n the shape of a drum ordisk. It has a series of contact parts 7),, b 5 b,, arranged on thedrum, as well as corresponding sliding parts 0,, 0, c 0, 0 a, 0 c,indicated by Specification of Letters Patent.

Patented Nov. 2, 1915.

Serial No. 639,215.

small circles. When the drum rotates it moves in the direction of thearrow, and different circuits are closed by by the engage- 'ment of thecontacts with the contact pieces.

The step switch B is an electromagnet, which at each impulse rotates bymeans of a pawl d and a ratchet wheel. 6, a contact disk f to an extentcorresponding to one tooth of the ratchet wheel'. In this way, thecontact piece 9, which is on the disk 7 finally comes into contact withthe two contacts h It, This step switch is further provided with areturn device, that is to say, with a device for bringing it back to itsinitial position. The device chiefly consists of a small electromagnet cwhich disengages a pawl it from the ratchet wheel 6, so that the latter,together with the-contact disk will return to its initial position underthe action of a spring, not shown in the drawing.

The synchronizing switch C is merely an electromagnet with a contactbreaker Z, Z

which it has toclose, while the working switch D is an electromagnetwhich at each impulse performs some work, for instance brings a contactdisk into and out of contact with the ignition circuit of the mine(assuming still the example selected).

If the circuits are followed in detail, it will be obvious that thisapparatus fulfils completely the conditions referred to. The firstimpulse closes the contact E, that is to say, completes a circuitpassing through the battery m, the winding of the electromagnet A, thecontact 0,, the contact plate 7),, and the contact 0' back to thecontact E. A second circuit is formed through the battery m, the windingof the electromagnet B, through the contact c contact plate 6 contact cback to E. The other circuits are on the contrary open. The disk or drumsecured to the clockwork, occupies during that time the position Thisimpulse brings about two results; on the one hand, it starts the timeswitch A, and then the step switch B. The time switch then continues torun, the drum moving to the position where the contacts b, c are on theline Y-Y, that is to say, the second impulse does not aifect providingthe predetermined, impulses have been received. At that moment, however,the circuit of the electromagnet of the switch C is closed, through thecontact 6 acurrent flowing from the battery through 0' 64,, 0 contact h,contact 9, contact h the winding of the electromagnet of C and back tothe bat tery 0. As soon as the electromagnet C is' energized, it closes,in its turn, the working switch-D, that is to say, a circuitis closedvthrough the battery 12, the contacts l l and the winding of theelectromagnetD. The armature of the electromagnet D can then perform thework allotted to it; The switch apparatus, by means of the contactpiece. b

then releases the step device,'- the circuit off' the battery n beingclosed over the winding, of the electromagnet i. Theenergized-electromagnet attracts its armature and thus disengages thepawl is from' the ratchet "wheel 6, so thatthe latter is returned by itstime interval which islon'ger than that prescribed, the time switch, onits time-interval expiring will release, by meansof itscontact device, 6the return device of the step switch B, so that the latter will returnto its initial position,'that is to say, will'not-z occupy at the lastimpulse the contact position. Thus the switch C, and consequently theswitch D are prevented from respond ing. If on the contrary, theimpulsesare given in a time interval shorter than that prescribed and theimpulses are continued, no exciting takes place in the switch C, ascontact 9 will have passedbeyond contacts h, h, when contact b reachescontacts 0,, 0, and the switch D will not therefore respond. The timeswitch, on the contrary, returns after the expiration cf the timeinterval, to its original position.

When the time interval of the time switch is altered by adjustment, andthe contact disk f with the contact 9' is replaced by another one, theconditions will be altered, so that a large number of combinations forproducing the release, will be obtained. If moreover the diaphragm incase of the use of acoustic waves, is arranged in such manner that itresponds only to a given note,

trio railway which" is started by ringing a bell or by whistling. Y

. Having fully described my invention, what -I- desire to claim, andsecure byLetters Pat-v ent of theUnited States, is' i 1. A securitydevice compr sing electric circuits, I containing three electromagneticelements, the first a time switch operated by electric impulses. .tochange said circuits, a step by step mechanism operated by electricimpulses in the circuit closedyby thetime a switch, s'aid step by stepmechanism'bein'g provided with a contact deviceable to close a' circuitsimultaneously with theicontact de vice of the time switch and havingjameans for resetting the said mechanism,-the resetting device arranged incircuit controlled", I

and. an. impulse receiving apparatus provided-with, acontactd'yice forclosing the "circuitof the time switch;

ing or-opening the circuit of the'relay, of a step by step mechanism andelectromagnet for. it, a contact apparatus adapted vto c ose certainnumber of steps, -a'time switch pro vided with a-"contact device rotatedby thetime switch and adapted-to close the second contact of the relaycircuit after being rotated a certain angle in a certain period and bythe time switch, substantially as set forth. v 2. In a:securitydevicefthe combination with a relayadapted to'be actuatedzbythesimultaneousaction offt'wo contact elements i in its circuit,iof'astepgby step'mechan ism adapted to close thefirst of-the-two'contactelements afterhaving proceeded with a cer- 'tain number ofsteps5=a time switch. provided with. contact elementsadapted toclose'vthe circuit after the ,elapsing of a certain period the firstcontact of the relay circuit after a an impulse receivingapparatusprovided with an electromagnet and a contact device for closingthe circuit offthe said ,electro-f magnet, substantially as set forth.-

4. In a security device thecombinati'on with a relay'adapted tobe.actuated by the simultaneous action of two contact elements in itscircuit, of a step by step mechanism adapted to close the first of "thetwo contact elements after havin proceeded a' certain number of steps, ar easing mechanismv for said step by step mechanism, a time switchprovided" with contact elements this number will be correspondinglyinadaptedto close the circuit after the elapsing of a certain period andan impulse receiving creased. Finally, some applications of theinvention may be mentioned.

For military purposes, the firing of mines has already been referred to.Further, the

.firing andsinking of torpedoes, the giving of certain signals may becited, in which case the release can be effected more particu-. larly byprojectors or by waves. Such a case would be for. instance that of anelecapparatus provided with a contact device for closing the circuit ofthe-time switch.

5. In a security device the combination with a relay adapted to beactuated'by the 7 simultaneous action of two contact elements elementsafter having proceeded a certain number of steps, means for turning backsaid step by step mechanism after a certain number of steps, a timeswitch provided with contact elements adapted to close the circuit afterthe elapsing of a certain period and an impulse receiving apparatusprovided with a contact device'for closing the circuit of the timeswitch. a

6. In a security device the combination with a. relay adapted to beactuated by the simultaneous action of two contacts closing or openingthe circuit of the relay, of a step by step mechanism and anelectromagnet for it, a contact apparatus adapted to close the firstcontact of the relay circuit after a certain number of steps, areleasing mechanism for said step by step mechanism, a time switchprovided with a contact device rotated by the time switch and adapted toclose the second contact of the relay circuit after being rotated acertain angle in a certain period and an impulse receiving apparatusprovided with an electromagnet and a contact device for closing thecircuit of the }said electromagnet, substantially as set fort 7. In asecurity device the combination with a relay adapted to be actuated bythe simultaneous action of two contacts closing or opening the circuitof the relay, of a step by step mechanism and an electromagnet for it, acontact apparatus adapted to close the first contact of the relaycircuit after a certain number of steps, means for turning back saidstep by step mechanism after a certain number of steps, a time switchprovided with a contact device rotated by the time switch and adapted toclose the second contact of the relay circuit after being rotated acertainangle. in a certain period and an impulse receiving apparatusprovided with an electromagnet and a contact device for closing thecircuit of the said electromagnet, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

oURT STILLE.

